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1. 发明授权

US08049625B1 High-performance mobile power antennas 有权
标题翻译：高性能移动电源天线
公开(公告)号：US08049625B1
公开(公告)日：2011-11-01
申请号：US12412627
申请日：2009-03-27
申请人： Dah-Weih Duan , Daniel J. Friedman , Harley Kent Heinrich , Ian Bardwell-Jones , Louis R. Ruggiero
发明人： Dah-Weih Duan , Daniel J. Friedman , Harley Kent Heinrich , Ian Bardwell-Jones , Louis R. Ruggiero
IPC分类号： G08B13/14
CPC分类号： G06K19/0709
摘要： An RFID tag's mobility can be increased and cost can be decreased by using high-performance mobile power antennas instead of battery powered tags. Disclosed are some power antennas that include a half wave rectifier, a full wave rectifier, and a voltage multiplier. These antennas can be cascaded to boost the power or voltage gain. Additionally, planar elements can be added to increase efficiency without decreasing mobility.
摘要翻译：通过使用高性能移动电源天线而不是电池供电的标签，可以提高RFID标签的移动性并降低成本。公开了一些功率天线，其包括半波整流器，全波整流器和电压倍增器。这些天线可以级联以提高功率或电压增益。此外，可以添加平面元件以提高效率而不降低移动性。

2. 发明授权

US06201474B1 Magnetic tape storage media having RFID transponders 有权
标题翻译：具有RFID应答器的磁带存储介质
公开(公告)号：US06201474B1
公开(公告)日：2001-03-13
申请号：US09195528
申请日：1998-11-18
申请人： Michael John Brady , Dah-Weih Duan , Venkata S. R. Kodukula
发明人： Michael John Brady , Dah-Weih Duan , Venkata S. R. Kodukula
IPC分类号： G08B1314
CPC分类号： G11B23/042 , G06K19/077 , G06K19/07758 , G06K2017/0074 , G11B27/002 , G11B27/11 , G11B2220/41 , G11B2220/65 , G11B2220/90
摘要： A magnetic tape information storage media includes a cassette housing having one or more spools for holding a length of magnetic tape and an integral radio frequency identification (RFID) transponder. The RFID transponder may be utilized by an external system to provide functions such as, automated sale, rental, or loan of the media, authentication of the media, indexing of information recorded to the media, enablement/disablement of playback of the media, recording of the number of times the media has been played, inventory, and the like.
摘要翻译：磁带信息存储介质包括具有用于保持一定长度的磁带的一个或多个卷轴和一体式射频识别（RFID）应答器的盒壳体。 RFID应答器可以被外部系统用于提供诸如媒体的自动销售，出租或贷款的功能，媒体的认证，记录到媒体的信息的索引，媒体的回放的启用/禁用，记录媒体已经播放的次数，库存等。

3. 发明授权

US6118379A Radio frequency identification transponder having a spiral antenna 有权
标题翻译：具有螺旋天线的射频识别应答器
公开(公告)号：US6118379A
公开(公告)日：2000-09-12
申请号：US191641
申请日：1998-11-13
申请人： Venkata S. R. Kodukula , Dah-Weih Duan , Michael John Brady
发明人： Venkata S. R. Kodukula , Dah-Weih Duan , Michael John Brady
IPC分类号： G06K19/077 , G08B13/24 , G08B13/14
CPC分类号： G08B13/2414 , G06K19/07749 , G08B13/2417 , G08B13/2431 , G08B13/2437 , G08B13/2442 , G08B13/2462
摘要： A radio frequency identification (RFID) transponder (tag) includes a spiral over ground plane antenna. The RFID tag includes a RFID circuitry that may be implemented as an RFID tag integrated circuit and may be mounted on one surface of a substrate such as a printed circuit board. The RFID tag circuitry may be electrically connected to an impedance matching circuit printed on the same side of printed circuit board. The matching circuit is electrically connected to a spiral antenna that may be mounted on same side of the printed circuit board as the tag circuit and matching circuit. The spiral antenna is held a prescribed distance from the ground plane in order to maximize the gain of the RFID tag and to thereby maximize the range of the RFID tag.
摘要翻译：射频识别（RFID）应答器（标签）包括地平面天线上的螺旋。 RFID标签包括RFID电路，其可以被实现为RFID标签集成电路，并且可以安装在诸如印刷电路板的基板的一个表面上。 RFID标签电路可以电连接到印刷在印刷电路板的同一侧上的阻抗匹配电路。匹配电路电连接到螺旋天线，其可以安装在印刷电路板的与标签电路和匹配电路相同的一侧上。螺旋天线与地平面保持规定的距离，以使RFID标签的增益最大化，从而使RFID标签的范围最大化。

4. 发明授权

US6097347A Wire antenna with stubs to optimize impedance for connecting to a circuit 失效
标题翻译：具有短截线的有线天线，以优化用于连接到电路的阻抗
公开(公告)号：US6097347A
公开(公告)日：2000-08-01
申请号：US790639
申请日：1997-01-29
申请人： Dah-Weih Duan , Harley Kent Heinrich
发明人： Dah-Weih Duan , Harley Kent Heinrich
IPC分类号： H01Q1/22 , H01Q9/16 , H01Q9/26
CPC分类号： H01Q1/2225 , H01Q1/22 , H01Q9/16 , H01Q9/26
摘要： An antenna, used as a voltage and power source, is designed to operate with an arbitrary load, or front end. One or more stubs are added to one or more of the antenna elements. The stubs act as two conductor transmission line and are terminated either in a short-circuit or open-circuit. Where the transmission line is odd multiples of the guided wavelength in length, the short-circuit stubs act as lumped inductors and the open-circuit stubs act as lumped capacitors. The magnitude of these lumped capacitors and inductors (reactances) is affected by a stub length, a stub conductor width, and a stub spacing. Zero or more short-circuit stubs and zero or more open-circuit stubs are added to one or more of the antenna elements to change the reactive (imaginary) part of the antenna input impedance. In a preferred embodiment, the reactive part is changed to equal the negative magnitude of the reactive part of the front end input impedance.
摘要翻译：用作电压和电源的天线被设计为以任意负载或前端工作。一个或多个短截线被添加到一个或多个天线元件中。短截线作为双导体传输线，并以短路或开路端接。在传输线是导向波长的奇数倍的长度的地方，短路短截线作为集总电感，开路短路充当集总电容。这些集总电容器和电感器（电抗）的大小受到短截线长度，短截线导体宽度和短截线间距的影响。将零个或更多个短路短线和零个或更多个开路短截线添加到一个或多个天线元件中以改变天线输入阻抗的无功（虚部）部分。在优选实施例中，将反应部分改变为等于前端输入阻抗的反应部分的负幅度。

5. 发明授权

US07246369B1 Broadband video distribution system using segments 有权
标题翻译：宽带视频分配系统采用分段
公开(公告)号：US07246369B1
公开(公告)日：2007-07-17
申请号：US09748442
申请日：2000-12-27
申请人： Dah-Weih Duan , Aparna Pappu , Monsong Chen , Bodhi Mukherjee
发明人： Dah-Weih Duan , Aparna Pappu , Monsong Chen , Bodhi Mukherjee
IPC分类号： H04N7/173 , G06F12/00 , G06F15/173
CPC分类号： H04N7/17318 , H04N21/2323 , H04N21/234345 , H04N21/2402 , H04N21/2405 , H04N21/84 , H04N21/8456
摘要： A method and apparatus to segment video data files within a video distribution system to facilitate the transfer of the video data files from a file server computing system to client computing system within a video distribution system. The data files are fragmented as a function of demand for the data files, size of each data file of the plurality of data files, amount of retention space available on each of the plurality of data storage devices, and available bandwidth for communication with the client computing systems.
摘要翻译：一种在视频分发系统内分割视频数据文件以便于将视频数据文件从文件服务器计算系统传送到视频分发系统内的客户端计算系统的方法和装置。数据文件被分段为数据文件的需求，多个数据文件中的每个数据文件的大小，多个数据存储设备中的每一个上可用的保留空间量，以及用于与客户端通信的可用带宽计算系统。

6. 发明授权

US06441740B1 Radio frequency identification transponder having a reflector 有权
标题翻译：具有反射器的射频识别应答器
公开(公告)号：US06441740B1
公开(公告)日：2002-08-27
申请号：US09259745
申请日：1999-02-27
申请人： Michael John Brady , Dah-Weih Duan , Venkata S. R. Kodukula , Paul Andrew Moskowitz
发明人： Michael John Brady , Dah-Weih Duan , Venkata S. R. Kodukula , Paul Andrew Moskowitz
IPC分类号： G08B1314
CPC分类号： H01Q1/2225 , B65D25/205 , B65D2203/10 , G06K19/07749 , H01Q1/22 , H01Q19/106 , H01Q19/13
摘要： An improved radio frequency transponder has a reflector to increase its operative range. A system of one or more reflectors is operatively associated with a transponder and may be formed out of any sort of radio frequency reflective material. The reflector system can enhance reception or transmission of radio waves by or from the transponder. The reflector system may also be used to provide for selective coupling of the radio frequency transponder with a base station, user- or vehicle-supported reader, or the like based on relative orientation. In addition, the reflector system may be used to selectively reflect particular radio waves.
摘要翻译：改进的射频应答器具有反射器以增加其操作范围。一个或多个反射器的系统与应答器可操作地相关联，并且可以由任何种类的射频反射材料形成。反射器系统可以增强或接收来自应答器的无线电波的接收或传输。反射器系统还可以用于基于相对取向来提供射频应答器与基站，用户或车辆支持的读取器等的选择性耦合。此外，反射器系统可以用于选择性地反射特定的无线电波。

7. 发明授权

US06400274B1 High-performance mobile power antennas 有权
标题翻译：高性能移动电源天线
公开(公告)号：US06400274B1
公开(公告)日：2002-06-04
申请号：US09426235
申请日：1999-10-25
申请人： Dah-Weih Duan , Daniel J. Friedman , Harley Kent Heinrich , Ian Bardwell-Jones , Lou Ruggiero
发明人： Dah-Weih Duan , Daniel J. Friedman , Harley Kent Heinrich , Ian Bardwell-Jones , Lou Ruggiero
IPC分类号： G08B1314
CPC分类号： H01Q1/2225 , G01S13/758 , G06K7/0008 , G06K19/0701 , G06K19/0723 , H01Q1/22 , H01Q21/29
摘要： An RFID tag's mobility can be increased and cost can be decreased by using high-performance mobile power antennas instead of battery powered tags. Disclosed are some power antennas that include a half wave rectifier, a full wave rectifier, and a voltage multiplier. These antennas can be cascaded to boost the power or voltage gain. Additionally, planar elements can be added to increase efficiency without decreasing mobility.
摘要翻译：通过使用高性能移动电源天线而不是电池供电的标签，可以提高RFID标签的移动性并降低成本。公开了一些功率天线，其包括半波整流器，全波整流器和电压倍增器。这些天线可以级联以提高功率或电压增益。此外，可以添加平面元件以提高效率而不降低移动性。

8. 发明授权

US06285342B1 Radio frequency tag with miniaturized resonant antenna 有权
标题翻译：射频标签带小型谐振天线
公开(公告)号：US06285342B1
公开(公告)日：2001-09-04
申请号：US09423063
申请日：1999-10-29
申请人： Michael John Brady , Dah-Weih Duan , Venkata S. R. Kodukula
发明人： Michael John Brady , Dah-Weih Duan , Venkata S. R. Kodukula
IPC分类号： H01Q136
CPC分类号： H01Q1/2225 , G06K19/07749 , H01Q1/22 , H01Q1/38 , H01Q23/00
摘要： An RF transponder is provided with a miniature resonant antenna that can fit on a small form factor the size of a button or coin. More particularly, the RF transponder comprises a substrate and an RF integrated circuit disposed thereon. An antenna is provided on the substrate and is electrically connected to the RF integrated circuit. The antenna has a contorted shape that permits it to fit into the limited available space on the substrate, while having an electrical length that is greater than a maximum length dimension of the substrate. Possible shapes for the antenna may include a meander antenna, a non-uniform meander antenna, a bent dipole antenna, a spiral antenna, a z-shaped dipole, a squeezed dipole antenna, or a combination of any of the antenna types. The RF transponder may further include at least one loading bar spaced from the antenna and/or at least one tuning stub coupled to the antenna.
摘要翻译： RF发射机应答器具有微型谐振天线，其可以适应小尺寸的按钮或硬币的尺寸。更具体地，RF应答器包括衬底和设置在其上的RF集成电路。天线设置在基板上并电连接到RF集成电路。天线具有扭曲的形状，其允许其适配到衬底上的有限可用空间中，同时具有大于衬底的最大长度尺寸的电长度。天线的可能形状可以包括曲折天线，不均匀曲折天线，弯曲偶极天线，螺旋天线，z形偶极子，挤压偶极子天线或任何天线类型的组合。 RF应答器还可以包括与天线间隔开的至少一个加载条和/或耦合到天线的至少一个调谐短截线。

9. 发明授权

US6147606A Apparatus and method for radio frequency transponder with improved read distance 有权
标题翻译：射频应答器的装置和方法，具有改善的读取距离
公开(公告)号：US6147606A
公开(公告)日：2000-11-14
申请号：US277271
申请日：1999-03-26
申请人： Dah-Weih Duan
发明人： Dah-Weih Duan
IPC分类号： G06K19/07 , G06K19/077 , H01Q1/22 , H01Q1/38 , H01Q9/26 , G08B13/14
CPC分类号： H01Q1/2225 , G06K19/0723 , G06K19/07749 , G06K19/07786 , H01Q1/22 , H01Q1/38 , H01Q9/26
摘要： A radio frequency identification transponder (RFID tag) in accordance with the principles of the present includes a tag antenna having a gain and an input impedance. The tag also includes RFID circuitry, which may be in the form of an RFID tag integrated circuit, the RFID circuitry also being characterized, in part, by an input impedance. According to the principles of the present invention the tag's read distance is maximized by tuning the tag antenna impedance and gain. In general, the imaginary part of the antenna impedance is chosen as the negative of the imaginary part of the RFID circuitry's impedance. Additionally, the real part of the tag antenna's impedance is selected by tuning those geometrical antenna parameters that affect both the antenna's gain and impedance. For RFID tags wherein the geometrical parameters of the tag antenna do not affect the gain G.sub.a of the tag antenna, the antenna input impedance may tuned to establish an antenna input impedance which is the complex conjugate of the RFID circuitry's input impedance.
摘要翻译：根据本发明的原理的射频识别应答器（RFID标签）包括具有增益和输入阻抗的标签天线。标签还包括RFID电路，其可以是RFID标签集成电路的形式，RFID电路也部分地由输入阻抗表征。根据本发明的原理，通过调谐标签天线阻抗和增益来使标签的读取距离最大化。通常，天线阻抗的虚部被选择为RFID电路的阻抗的虚部的负数。另外，通过调整影响天线增益和阻抗的几何天线参数来选择标签天线阻抗的实际部分。对于其中标签天线的几何参数不影响标签天线的增益Ga的RFID标签，天线输入阻抗可以被调谐以建立天线输入阻抗，其是RFID电路的输入阻抗的复共轭。

10. 发明授权

US6028564A Wire antenna with optimized impedance for connecting to a circuit 失效
标题翻译：具有优化阻抗的电线天线，用于连接电路
公开(公告)号：US6028564A
公开(公告)日：2000-02-22
申请号：US790640
申请日：1997-01-29
申请人： Dah-Weih Duan , Daniel Joseph Friedman , Harley Kent Heinrich
发明人： Dah-Weih Duan , Daniel Joseph Friedman , Harley Kent Heinrich
IPC分类号： H01Q1/36 , H01Q9/16 , H01Q19/10
CPC分类号： G06K19/07786 , H01Q1/36 , H01Q9/16
摘要： An antenna used as a voltage and power source is designed to operate with arbitrary load, or front end. The antenna has one or more (number of) loading bars that are placed adjacent to the elements of the antenna at a spacing distance. The real part of the antenna input impedance is changed by adjusting the loading bar length, width, and/or spacing distance and/or the number of loading bars. These changes are implemented to reduce the real part of the antenna input impedance to make it small enough to develop an adequate voltage, Vp, to operated the front end and connected circuitry. In a preferred embodiment, the real part of the antenna input impedance is reduced to the point at which Vp no longer increases. One or more stubs is added to one or more of the antenna elements. The stubs act as two-conductor transmission line and is terminated either in a short-circuit or open-circuit. The short-circuit stubs act as a lumped inductor. The open-circuit stub acts as a lumped capacitor. The magnitude of these lumped capacitors and inductors (reactances) is affected by a stub length, a stub conductor width, and a stub spacing. Zero or more short-circuit stubs and zero or more open-circuit stubs are added to one or more of the antenna elements to change the reactive (imaginary) part of the antenna input impedance. In a preferred embodiment, the reactive part is changed to be equal to the negative magnitude of the reactive part of the front end input impedance. For a given real part of the antenna impedance, Ra, this approach maximizes both the DC voltage generated from the input and maximizes the power transferred between the antenna and the front end.
摘要翻译：用作电压和电源的天线设计为以任意负载或前端工作。天线具有一个或多个（多个）加载条，其以间隔距离放置在与天线的元件相邻的位置。天线输入阻抗的实际部分是通过调节加载杆长度，宽度和/或间隔距离和/或加载杆的数量来改变的。实现这些改变以减少天线输入阻抗的实际部分，使其足够小以产生足够的电压Vp来操作前端和连接的电路。在优选实施例中，天线输入阻抗的实部减小到Vp不再增加的点。将一个或多个存根添加到一个或多个天线元件中。短截线作为双线传输线，并以短路或开路端接。短路短路充当集总电感。开路短截线作为集总电容器。这些集总电容器和电感器（电抗）的大小受到短截线长度，短截线导体宽度和短截线间距的影响。将零个或更多个短路短线和零个或更多个开路短截线添加到一个或多个天线元件中以改变天线输入阻抗的无功（虚部）部分。在优选实施例中，将反应部分改变为等于前端输入阻抗的反应部分的负幅度。对于天线阻抗Ra的给定实际，该方法使从输入端产生的直流电压最大化，并使天线和前端之间传递的功率最大化。

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